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authorLennert Buytenhek <buytenh@wantstofly.org>2006-09-18 18:23:07 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-09-25 05:25:47 -0400
commit72edd84a6b2db1a21d1ed07929cae560e276a0a6 (patch)
treeb67000e2bbf7447968c784cc3696a680ad66c47e /arch/arm
parent610300e8f4f833904096ca1233ffd9dbd73fb11f (diff)
[ARM] 3827/1: iop3xx: add common gpio module
Implement the gpio_line_{config,get,set} API for iop3xx. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/plat-iop/Makefile2
-rw-r--r--arch/arm/plat-iop/gpio.c48
2 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/plat-iop/Makefile b/arch/arm/plat-iop/Makefile
index d20cdec3a944..23da00b11517 100644
--- a/arch/arm/plat-iop/Makefile
+++ b/arch/arm/plat-iop/Makefile
@@ -2,7 +2,7 @@
2# Makefile for the linux kernel. 2# Makefile for the linux kernel.
3# 3#
4 4
5obj-y := i2c.o pci.o setup.o time.o 5obj-y := gpio.o i2c.o pci.o setup.o time.o
6obj-m := 6obj-m :=
7obj-n := 7obj-n :=
8obj- := 8obj- :=
diff --git a/arch/arm/plat-iop/gpio.c b/arch/arm/plat-iop/gpio.c
new file mode 100644
index 000000000000..eda436083417
--- /dev/null
+++ b/arch/arm/plat-iop/gpio.c
@@ -0,0 +1,48 @@
1/*
2 * arch/arm/plat-iop/gpio.c
3 * GPIO handling for Intel IOP3xx processors.
4 *
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 */
12
13#include <linux/device.h>
14#include <asm/hardware/iop3xx.h>
15
16void gpio_line_config(int line, int direction)
17{
18 unsigned long flags;
19
20 local_irq_save(flags);
21 if (direction == GPIO_IN) {
22 *IOP3XX_GPOE |= 1 << line;
23 } else if (direction == GPIO_OUT) {
24 *IOP3XX_GPOE &= ~(1 << line);
25 }
26 local_irq_restore(flags);
27}
28EXPORT_SYMBOL(gpio_line_config);
29
30int gpio_line_get(int line)
31{
32 return !!(*IOP3XX_GPID & (1 << line));
33}
34EXPORT_SYMBOL(gpio_line_get);
35
36void gpio_line_set(int line, int value)
37{
38 unsigned long flags;
39
40 local_irq_save(flags);
41 if (value == GPIO_LOW) {
42 *IOP3XX_GPOD &= ~(1 << line);
43 } else if (value == GPIO_HIGH) {
44 *IOP3XX_GPOD |= 1 << line;
45 }
46 local_irq_restore(flags);
47}
48EXPORT_SYMBOL(gpio_line_set);